I can see why this piece of art was adopted by one of the TN organisations as its motif. It’s apparently out of copyright now. It’s iconic, probably among the best known artworks of the modern age… but there’s more…
I’ve obviously seen this countless times, but a few days ago, browsing around the art of pain I saw this in a way I’d never seen it before.
Anyway, I’m not here to do some lay hack analysis of a great work.
The Wikipedia entry is a good jumping-off point.
And read the BBC write-up if so inclined.